curl --request POST \
  --url http://localhost:8000/api/v1/licenses/customers/{customer_id}/assign \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "global_license_id": 123
}
'

{
  "id": 123,
  "google_ads_customer_id": 123,
  "global_license": {
    "name": "<string>",
    "price": 123,
    "analysis_type": "keyword_pause",
    "analysis_max_once_in_n_days": 123,
    "max_search_terms": 123,
    "id": 123,
    "date_added": "2023-11-07T05:31:56Z",
    "date_updated": "2023-11-07T05:31:56Z"
  },
  "date_added": "2023-11-07T05:31:56Z",
  "date_updated": "2023-11-07T05:31:56Z",
  "expires_at": "2023-11-07T05:31:56Z"
}